OpenAPI code-gen tools

Swagger Codegen | Swagger Docs

 oapi-codegen/oapi-codegen: Generate Go client and server boilerplate from OpenAPI 3 specifications @GitHub

ogen-go/ogen: OpenAPI v3 code generator for go @GitHub

smithy-lang/smithy-python: Smithy code generators and core modules for Python (in development) @GitHub

typespec.io

for TypeScript

tRPC - Move Fast and Break Nothing. End-to-end typesafe APIs made easy. | tRPC

for TypeScript

ferdikoomen/openapi-typescript-codegen: NodeJS library that generates Typescript or Javascript clients based on the OpenAPI specification @GitHub

fardad-dev/swagger-typescript: An auto typescript/javascript code generator from swagger.